Improvement in preventing incrustation of steam-boilers



A.F.PORTER. PREVENTING INORUSTATION 0P STEAM BOILERS. No. 50.774.

Patented Oct. 31, 1865.-

no" wasumcrou u c UNITED STATES P TENT Darren.

A. F. PORTER, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO' HIMSELF AND Gr. 0. EVANS, OF SAME PLACE.

iMPROl/EMENT IN PREVENTING INCRUSTATION OF STEAM-BOILERS.

- Specification forming part of Letters Patent No. 50,774, dated October 31', 1865; antedated May 1, 1865.

ings, and to the letters of reference marked My invention consists of a conductor armed at one end with a series of points or their equivalents, and connected at the other extremity with the shell of the boiler, the whole being'suspended within the boilerlatsome intermediate point by an insulated attachment,

"an substantially as described hereinafter.

In order'to enable others to use my invention, I will now proceed to describe the man: ner in which I carry it into effect.

On reference to the accompanying drawings, which form a part of this specification, Figure l is a side view of apparatus whereby I carry out my mode of preventing incrustation' of steam-boilers, and Fig. 2 a plan view of theapparatus.

Similarletters refer to similar parts in both views. I

The red lines A, Fig. 1, represent, in section, the upper portion of a steam-boiler, in which B is the water-line.

In the upper shell of the boiler, near one end of the same, I screw a rod, D, which, if desired, may be further secured by a nut, a. This rod passes through a hole in the metal block E, which is confined to the rod between the collar 5 on the latter'and. a washer,f, by a suitable i1ut,h. It should beunderstood that the hole in the metal block through which the rod 1) passesis lined with glass, porcelain, enamel, or other non-conductor of electricity, and that the non-conducting material intervenes between the-collar c and the block, as well as between the block and the washer f, so that the rod'D,although firmly secured to the block, is perfectly insulated.

The blockE has two projections, 11 and t, to the former of which is secured a metal rod, F,

carrying atthe end a sphere, G, and from the latter project any suitable number of wires, H, each of which terminates in a point. To the opposite projection, 'i, is secured a pin, I, to which is attached one endof a coiled wire, J, the opposite end of the latter being secured to a pin, K, which is screwed into or otherwise secured to the upper plate of the boiler at a point as far distant as possible from-that where the rod D is attached.

The metallic points collectwhatever electricity may be generated within the boiler,

which electricity passes successively to thesphere G, the rod F, block E, pm I, coil J, pin K, and tothe shell of the boiler.

his well known that thecalcareons deposits formed in evaporating'water assume the characterof a stony, crystalline inerustation, which becomes firmly attached to the interior of the boiler, and especially to the lower portions of the same. Thisis one of the mostserious evils with which engineers have to contend, as the incrustation is, aformidable non-conductor of heat, impairs the'efficiency ot'the boilers, and causes a great waste of fuel. -After many practical tests Iltave-found that the accumulationof the usual calcareous deposit is prevented by the above-described apparatus.

I claim as m'yinven-tiou and desire to secure by Letters Patent- The above-described apparatus for preventin g'incr'ustatiou in steam-boilers, the same sisting of a conductor armed at one end with a series of points or their equivalents, and connected at the other extremity with the shell of the boiler, the whole being suspended within the boiler at .some intermediate point by an insulated attachment, all'substautially as herein set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

A. F. PORTER.

Witnesses JOHN WHITE, CHARLES Howson. 

